A heating element is made by maintaining a potential difference of 75 .0 V across the length

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A heating element is made by maintaining a potential difference of 75 .0 V across the length of a Ni chrome wire that has a 2.60 x 10-6 m2 cross section. Ni chrome has a resistivity of 5.00 x 10-7 Ω ∙ m.

(a) If the element dissipates 5000 W what is its length?

(b) If 100 V is used to obtain the same dissipation rate, what should the length be?

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Fundamentals of Physics

ISBN: 978-0471758013

8th Extended edition

Authors: Jearl Walker, Halliday Resnick

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Question Posted: Jan 19, 2011 05:07 AM

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A heating element is made by maintaining a potential difference of 75 .0 V across the length

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a From P VR AV2PL we solve for the ...View the full answer

Fundamentals of Physics

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